Linux-Development-Sys Digest #643, Volume #6 Thu, 22 Apr 99 01:14:29 EDT
Contents:
Re: Help - Installing module for new kernel (Jim Roberts)
Re: Threads >> PThreads or LinuxThreads?? (Sander Zijlstra)
Flashnet Chatscript ([EMAIL PROTECTED])
Re: pthreads: Need help setting realtime priority! ("Udo Giacomozzi")
Re: "Permission denied" ("Bill Zimmerly")
Thing about Linux you do not know... ([EMAIL PROTECTED])
Re: Flashnet Chatscript (Clifford Kite)
Re: Flashnet Chatscript (Alan McLean)
disable interrupt ("J.C. Chuang")
[A] Linux pstat() or table() equivalent (Paul Roebuck)
SCSI emulation for atapi devices (Marcin Romaszewicz)
----------------------------------------------------------------------------
From: [EMAIL PROTECTED] (Jim Roberts)
Subject: Re: Help - Installing module for new kernel
Date: Wed, 21 Apr 1999 17:40:08 GMT
> Hello,
> I am using Redhat 5.2 without the update rpm installed at the moment.
> But the same problem exist with the updated rpm. After I successfully
> compile my kernel, I tried to install the modules. When I typed make
> modules_install in the /usr/src/linux directory, it tells me that no *.o
> files found. when I do a ls on the modules directory, there is no
> file(s) there. Is this a problem or did I do something wrong?
>
> Any advise will be greatly appreciated.
>
> Thanks
>
>
> Simon
>
Simple question Simon. Did you "make modules" before trying
to install them?
--
Jim Roberts Never enough time!
[EMAIL PROTECTED]
------------------------------
From: Sander Zijlstra <[EMAIL PROTECTED]>
Subject: Re: Threads >> PThreads or LinuxThreads??
Date: Tue, 20 Apr 1999 15:51:14 +0200
Thomas Strohm wrote:
>
> K Prabhakaran wrote:
> > LinuxThreads
> > In this for every threads it is creating a process(not really), like
> > when i do a "ps" command it shows all the threads i created as a process.
> > Why it is?
>
> This is how LinuxThreads are implemented. A new thread is created
> basically
> by a clone(2) system call which is very similar to fork(2). For
> clone(2), the
> child process (thread) shares the memory pages with the parent. For
> fork(2),
> they are copy-on-write, that is, they are shared until one of the
> processes
> writes to them. Then they are copied, and the parent and the child have
> different
> memory pages.
>
> If you do 'ps', you see the threads, because they are like different
> processes
> sharing their memory pages.
>
> Thomas.
I read your comment like above and have a question also... about
threads.... I also used threads and like to know whether I use PThreads
(POSIX) or LinuxTHreads.... because I use the headerfile pthreads.h and
this file says that it's the Linux implementation of Pthreads but I
thought that Linuxthreads weren't completely implemented yet..?...so
what am I using according to the fact that I include the pthreads.h
file???
--
Sander Zijlstra,
HTS graduating student.
Delft University of Technology.
Faculty of Information Technology and Systems. (ITS)
Mobile Multimedia Communication Project. (MMC)
E-mail: [EMAIL PROTECTED]
Room: 11.110
Phone: +31 (0)15-2783234
url: http://mmc.et.tudelft.nl/~sander
--- Microsoft SELLS you Windows, Linux GIVES you the whole house ---
------------------------------
From: [EMAIL PROTECTED]
Subject: Flashnet Chatscript
Date: Tue, 20 Apr 1999 13:37:24 GMT
I cannot seem to construct a usable chatscript to connect to flashnet. I am
using RH52, and can connect using 2 xterms. One is used to initiate a minicom
session, while the second is used to start the ppp daemon BEFORE flashnet
drops my connection. I am a novice user of ppp and chat, therefore any help
would be appreciated.
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------------------------------
From: "Udo Giacomozzi" <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.development.apps
Subject: Re: pthreads: Need help setting realtime priority!
Date: Tue, 20 Apr 1999 16:15:00 +0200
I forgot one thing: I'm using Kernel 2.0.36 (SuSE 5.3). is that the
problem??
Thanks
Udo Giacomozzi
--
* Email: [EMAIL PROTECTED]
* UIN: 17745247 (@pager.mirabilis.com)
Udo Giacomozzi schrieb in Nachricht
<7ffkra$lff$[EMAIL PROTECTED]>...
>Hi!
>
>I urgently need help to solve a problem with LinuxThreads.
>I made a program that creates a thread (that for now does just wait) using
>the pthread library. So far, so good. The problem is I can't set realtime
>priority to the thread.
>
>The program is written in Pascal, but the pthread calls are just the same.
I
>can give you the source code and/or executable if you want, but let me
>explain in words how I set the priority:
>
>- First I prepare a pthread_attr_t using pthread_attr_init().
>- Then I set the scheduling policy SCHED_FIFO (should be the constant 1)
>with pthread_attr_setschedpolicy.
>- Next I set the priority level to 90 using pthread_attr_setschedparam().
>- I can now check the settings using pthread_attr_getschedpolicy() and
>pthread_attr_getschedparam() and they return the right values (SCHED_FIFO,
>priority 90)
>
>- Ok, now I create the thread using pthread_create(). I think the C syntax
>would be like this:
> pthread_create(&ThreadID, &thread_attr, Thread_Start_Routine, null)
>
>Good. No problems so far. No function returns any error and the thread is
>created successfully.
>
>- Now I check again the thread status, but using
>pthread_getschedparam(ThreadID, &policy, &sched_level) this time. And this
>function returns SCHED_OTHER with priority 0 !!!
>
>I can't understand why this is so because *never* a function returns an
>error (but it does so when I set a invalid scheduling policy).
>
>Note it doesnt change whether I'm logged in as root or not.
>
>Anyone has a idea what I should do??
>
>Thanks in advance!!!!
>Udo Giacomozzi
>
>F'up to comp.os.linux.development.apps
>
>--
>* Email: [EMAIL PROTECTED]
>* UIN: 17745247 (@pager.mirabilis.com)
>
>
>
------------------------------
From: "Bill Zimmerly" <[EMAIL PROTECTED]>
Subject: Re: "Permission denied"
Date: Tue, 20 Apr 1999 09:05:10 -0500
Thanks for the timely reply Peter.
Although at this moment, since I spent most of last night reinstalling
everything, I do want to know how I can, as you put it, "check to make sure
inetd really is running as root".
- Bill
Peter Samuelson <[EMAIL PROTECTED]> wrote in message
news:7fgoc9$7l0$[EMAIL PROTECTED]...
> [snip]
> > I looked at the "inetd.conf" file and all seems to be okay. "root" is
> > how these processes are started! HELP!!!!!!!
>
> inetd is having the problem *before* it starts any processes. Check to
> make sure inetd really is running as root.
>
> --
> Peter Samuelson
> <sampo.creighton.edu!psamuels>
------------------------------
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Subject: Thing about Linux you do not know...
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------------------------------
From: kite@NoSpam.%inetport.com (Clifford Kite)
Subject: Re: Flashnet Chatscript
Date: 20 Apr 1999 10:11:21 -0500
[EMAIL PROTECTED] wrote:
: I cannot seem to construct a usable chatscript to connect to flashnet. I am
: using RH52, and can connect using 2 xterms. One is used to initiate a minicom
: session, while the second is used to start the ppp daemon BEFORE flashnet
: drops my connection. I am a novice user of ppp and chat, therefore any help
: would be appreciated.
This really isn't the group for this question. Try comp.os.linux.networking.
--
Clifford Kite Not a guru. (tm)
[EMAIL PROTECTED] Better is the enemy of good enough.
------------------------------
From: [EMAIL PROTECTED] (Alan McLean)
Subject: Re: Flashnet Chatscript
Date: Tue, 20 Apr 1999 16:31:25 GMT
[EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> I cannot seem to construct a usable chatscript to connect to flashnet. I am
> using RH52, and can connect using 2 xterms. One is used to initiate a minicom
> session, while the second is used to start the ppp daemon BEFORE flashnet
> drops my connection. I am a novice user of ppp and chat, therefore any help
> would be appreciated.
You only really need two config files
/etc/ppp/options
================
/dev/ttyS1 <-- com2 under DOS/Win, ttyS0 == com1
115200 <-- OK for 28.8k or above
domain flash.net
ipcp-accept-local
ipcp-accept-remote
noipdefault
defaultroute
modem
crtscts
lock
connect "/usr/sbin/chat -f /etc/ppp/chat-flash"
/etc/ppp/chat-flash <-- chmod 600
===================
REPORT CONNECT
ABORT BUSY
ABORT 'NO CARRIER'
'' ATZ <---+
OK AT&F |
OK ATW2 |-- change to suit
OK ATM0 |
OK ATS2=255 <---+
OK ATDTxxxyyyzzzz <-- replace
CONNECT ''
ogin: login <-- replace
ssword: passwd <-- replace
To bring the link up
/usr/sbin/pppd
To bring the link down
kill `cat /var/run/ppp0.pid`
You could use sudo/super to run these, or put wrappers around
them. I wrote simple pon/poff wrappers, but they are too
long to post here. Send me mail if you need them.
I run Debian, but I believe RedHat may have a graphical PPP
config program in control-panel that would take care of all
this for you. If thats so, then give it a try.
cheers
-amcl
------------------------------
From: "J.C. Chuang" <[EMAIL PROTECTED]>
Subject: disable interrupt
Date: 20 Apr 1999 15:42:20 GMT
Hi, all
I often read some code that is used to disable interrupt by the
following form:
save_flags();
cli();
critical section....
restore_flags();
What I don't understand is why no any code to enable interrupt
again ??
Best Regards,
J.C. Chuang
------------------------------
Date: Wed, 21 Apr 1999 23:38:03 -0500
From: [EMAIL PROTECTED] (Paul Roebuck)
Subject: [A] Linux pstat() or table() equivalent
In article <[EMAIL PROTECTED]>, [EMAIL PROTECTED] (Jens-Uwe Mager) wrote:
>On Mon, 19 Apr 1999 07:45:23 -0500, Paul Roebuck <[EMAIL PROTECTED]> wrote:
>
>>Is the /proc filesystem guaranteed to be accessible? On some systems I
>>have used in the past, there were security considerations as to whether
>>this filesystem would be mounted. Is this not the case for Linux?
>
>You can umount it, yes. But there quite a few things that rely on /proc
>functionality nowadays, so I would not expect anyone doing it.
Bearing that in mind, I'll go with the following code. It's less than what
I would
have hoped to find but it does work. I still feel that a Linux version of
pstat()
that simply did this kind of thing for you would have been handy. Anyway, thanks
for your help!
#ifndef _PATH_PROC
#define _PATH_PROC "/proc"
#endif
/*============================================================================
*
* Name:: RetrieveAppProcessName
*
* Description::
* Provides the "glue" to give the high level routines access to the
* name of the process. This should be replaced by an application
* registry call of sorts but that doesn't exist at this point in time.
*
* Calling Sequence::
* RetrieveAppProcessName (&processNameStr);
*
* Inputs::
* (None)
*
* Outputs::
* processName - Name of the application (i.e., argv [0]).
*
* Return Values::
* (None)
*
*============================================================================*/
#ifndef _NO_PROTO
static void RetrieveAppProcessName (String *processName)
#else
static void RetrieveAppProcessName (processName)
String *processName;
#endif /* _NO_PROTO */
{
FILE *proc;
char pathName [PATH_MAX+1];
char buffer [LINE_MAX+1];
char *buffPtr;
Boolean found= False;
assert (processName != NULL);
/* Read the cmdline file for our process from /proc filesystem */
sprintf (pathName, "%s/%d/cmdline", _PATH_PROC, getpid ());
if ((proc= fopen (pathName, "r")) != NULL) {
if (fgets (buffer, sizeof (buffer), proc) != NULL) {
/* Strip path from executable name, if necessary */
if ((buffPtr= strrchr (buffer, '/')) != NULL)
buffPtr++;
else
buffPtr= buffer;
found= True;
}
fclose (proc);
}
if (found)
*processName= XtNewString (buffPtr);
else
*processName= XtNewString (UNKNOWN_STR);
}
------------------------------
From: marcin@asmodean (Marcin Romaszewicz)
Subject: SCSI emulation for atapi devices
Date: 22 Apr 1999 00:40:40 GMT
Reply-To: [EMAIL PROTECTED]
Hi All,
I have a question perhaps someone here can answer; I haven't found an
answer in any docs.
I've got an ATAPI CD-RW drive, and I am using cdrecord to burn CD's. In order
for this to work, I must disable atapi cd-rom support and enable the scsi
host adapter emulation, generic scsi support, and scsi cdrom support.
Now, this is all well and good, and it works, I can successfully write CD's,
but I can not mount CD's. To mount a CD, I either have to recompile the kernel
or rmmod all the scsi stuff and insmod the atapi cdrom support.
Is there a way, with scsi emulation and related modules installed, to mount
an atapi cdrom as a scsi cdrom? When I try mounting /dev/cdrom (kernel says
it detected a cdrom) or /dev/sda I get a message about an unsupported
command getting sent to hdc (where the cdrom actually lives).
Is there another way to mount the cd while the scsi support is present? I'm
just looking to be able to burn a CD and mount one on the same kernel
configuration.
Any ideas?
Thanks
------------------------------
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